quasar | dd1ff957df241c8301de5be805cbe9c484a9d3768e657afffc83a0697f881674

General

Target

Client-built.exe
Size

1.5MB
MD5

efdf48328fd93af977682db2ac7b56ce
SHA1

006abc06af3cdc20dd52588beb5ce4f13273f2db
SHA256

dd1ff957df241c8301de5be805cbe9c484a9d3768e657afffc83a0697f881674
SHA512

30f723977dd6006954f6fc19c23abf421c11a00845ba9dbbd9a465ce6c7a023f96bc641023a1833605cc0306d1e4a7371cee7e2f31bb755d02c25f548949f8d3
SSDEEP

24576:uU1R7bTS2eWBRwRR16zhHIPbcNK0KKm77yviUSQaZaOwI55l2S62r9exnXWiA1Qx:uqRR7wR2EgKKm77LrwCB6T+1Q

Score

10^/10

quasar spyware trojan

Malware Config

Extracted

Family

quasar

Attributes

encryption_key
1FB7485171FF20CDA99F01C1B832D8813FC1E606
reconnect_delay
3000
startup_key
�&)M-Im�� c�hp��C��.��

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/5328-1-0x0000022E67A40000-0x0000022E67BD2000-memory.dmp	family_quasar
behavioral1/files/0x00070000000240a5-8.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
5132	Client.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Client.exe	Client-built.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Client-built.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3616	schtasks.exe
852	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
5132	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5328	Client-built.exe
Token: SeDebugPrivilege	5132	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5328 wrote to memory of 3616	5328	Client-built.exe	89
PID 5328 wrote to memory of 3616	5328	Client-built.exe	89
PID 5328 wrote to memory of 5132	5328	Client-built.exe	91
PID 5328 wrote to memory of 5132	5328	Client-built.exe	91
PID 5132 wrote to memory of 852	5132	Client.exe	92
PID 5132 wrote to memory of 852	5132	Client.exe	92

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5328
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Pulsar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3616
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5132
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Pulsar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:852

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\system32\SubDir\Client.exe

Filesize
1.5MB

MD5
efdf48328fd93af977682db2ac7b56ce

SHA1
006abc06af3cdc20dd52588beb5ce4f13273f2db

SHA256
dd1ff957df241c8301de5be805cbe9c484a9d3768e657afffc83a0697f881674

SHA512
30f723977dd6006954f6fc19c23abf421c11a00845ba9dbbd9a465ce6c7a023f96bc641023a1833605cc0306d1e4a7371cee7e2f31bb755d02c25f548949f8d3

Download Submit
memory/5132-13-0x000001DD69490000-0x000001DD694E0000-memory.dmp

Filesize
320KB

Download
memory/5132-18-0x000001DD69660000-0x000001DD6968A000-memory.dmp

Filesize
168KB

Download
memory/5132-24-0x000001DD699F0000-0x000001DD69AF2000-memory.dmp

Filesize
1.0MB

Download
memory/5132-10-0x00007FFBF0A80000-0x00007FFBF1541000-memory.dmp

Filesize
10.8MB

Download
memory/5132-23-0x00007FFBF0A80000-0x00007FFBF1541000-memory.dmp

Filesize
10.8MB

Download
memory/5132-11-0x00007FFBF0A80000-0x00007FFBF1541000-memory.dmp

Filesize
10.8MB

Download
memory/5132-21-0x000001DD69B30000-0x000001DD69B42000-memory.dmp

Filesize
72KB

Download
memory/5132-22-0x000001DD69B90000-0x000001DD69BCC000-memory.dmp

Filesize
240KB

Download
memory/5132-12-0x000001DD69400000-0x000001DD6943A000-memory.dmp

Filesize
232KB

Download
memory/5132-15-0x000001DD69440000-0x000001DD6948E000-memory.dmp

Filesize
312KB

Download
memory/5132-14-0x000001DD695A0000-0x000001DD69652000-memory.dmp

Filesize
712KB

Download
memory/5132-17-0x000001DD69530000-0x000001DD6957A000-memory.dmp

Filesize
296KB

Download
memory/5132-16-0x000001DD694E0000-0x000001DD6952C000-memory.dmp

Filesize
304KB

Download
memory/5328-2-0x0000022E67FB0000-0x0000022E67FCA000-memory.dmp

Filesize
104KB

Download
memory/5328-0-0x00007FFBF0A83000-0x00007FFBF0A85000-memory.dmp

Filesize
8KB

Download
memory/5328-1-0x0000022E67A40000-0x0000022E67BD2000-memory.dmp

Filesize
1.6MB

Download
memory/5328-9-0x00007FFBF0A80000-0x00007FFBF1541000-memory.dmp

Filesize
10.8MB

Download
memory/5328-3-0x00007FFBF0A80000-0x00007FFBF1541000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

Loading Replay Monitor...

Downloads